Counter body

We also draw attention to a funnel techniqu in which a hydrophobic funnel is moved across a LG surface in order to compress or expand its area isotropically. A counter-body compensates for the displaced liquid by moving in the opposite direction. In this way the meniscus level remains constant. Relaxation processes, induced by the funnel movement are monitored through a Wilhelmy plate. In this... 

Friction parts made from structural inhibited plastics retard mechanochem-ical wear of conjugated metal counter bodies. Liberation of volatile Cl from plastic units located in a closed volume hampers corrosion of all metal elements of the design found in this volume. The cost effectiveness of structural plastics is mainly composed of the reduction of repair expenses of the equipment. 

The elements of such a system consist of the primary body, the counter body, the interfacial medium and surrounding medium. Wear is a result of the action of the collective stress on the structure respectively on the elements of the tribological system and manifests itself in energetic and material interactions between these elements. It is defined by the wear parameters. Basically all wear mechanisms can occur abrasion, adhesion, tribo-chemical reactions or wear caused by fatigue. In the case of the extrusion of ceramic bodies, corrosion must be considered as another harmful mechanism. When determining the elements of the tribosystem for the... 

Whilst on the one hand the ceramic mass causing the wear can be clearly identified as the counter body, on the other it is very difficult within the area of extrusion to carry out a wear-specific classification of the many different systems of material. This can most readily be approached in relation to pure abrasion, as it is only materials or their component substances which have a higher hardness value than those of the fixed boundaries enclosing the working space, which can produce wear in the high position . 

The fatigue by wear is a characteristic phenomenon of the friction of elastomers with a counter body with sharpened excrescences, when the detachment of polymer particles occurs due to of... 

In the case of somne rigid polymers worn by friction the influence of the nature of the counter-body on the mechano-degra-dation intensity is shown by the data collected in Table 3.123 [978,... 

Figure 3.358. Dependence of the value of the wear by friction by the nature of counter body and temperature (conventional names, see Figure 354) [959] 1, 3, 5, 7) film 2, 4, 6, 8) network.

Despite the fact that the width of the sliding track increases progressively due to wear during sliding tests performed against a curved counter-body, a mean sliding track area, At is taken for simplicity, and defined as ... 

Wear is the progressive loss of material from the surface of a solid body, caused by mechanical causes, e.g., contact and relative motion of a solid, liquid or gaseous counter body. ... 

According to DIN 50320, the elements of the tribological system consist of a base body, a counter body, intermediate material, and surrounding medium (Figure 5.26). 

Counter body = molding compound or especially filler material of the... 

Formation of reaction products during the chemical reaction of base body, counter body, and adjacent medium... 

Particle cleavage (erosion) Freely moving particles, which are carried in an intermediate medium between the base and counter body cause the wear (three-body abrasion). 

Effect of Polarity of Counter Body on Friction Force of Butadiene-Acrylonitrile Rubber (Data of A. Konstantinova (Ref. 49))... 

Current-time transients of NiP, NiPSiClO, NiPSiCSO and NiPSiC200 coatings under tribocorrosion conditions in 0.6 M NaCl (conditions contact configuration ball-on-plate coated steel as plate and corundum ball (5 mm 0) as counter body load 8 N frequency 2 Hz stroke length 1 mm number of fretting cycles 3500.Tests were conducted with an impressed anodic potential of + 400 mV vs. SCE) (Malfatti et a ., 2009). 

Besides the most basic and predominant nonpolar interactions (dispersion forces), there are polarization or polar interactions between molecules of counter bodies, such as dipole-dipole interactions (Keesom 1922) and dipole-induced dipole interactions (Debye 1921). The essential difference between dispersion and polarization forces is that, while the former involve simultaneous excitation of both molecules, those for the latter involve only a passive partner. The Keesom orientation interaction energy between two molecules with permanent dipoles is temperature dependent and proportional to the dipole moments as follows ... 

Erosive wear can be defined as degradation of material due to impact of particles travelling with significant velocity. A tribosystem suffering from erosive wear can be characterized as an open system. In such a system the counter body is continuously replaced. Another feature is that the wear of the counter body is unimportant. 

Abrasive wear is defined as the material loss when a hard particle is made to slide against a soft material. Abrasive wear is classified as two-body abrasion or three-body abrasion. In two-body abrasion, abrasive particles move freely over a material face as in sand sliding down a chute. In three-body abrasion, abrasive particles act as interfacial elements between the solid body and the counter body. It can be classified as high stress abrasion or low stress abrasion depending on the applied stresses. 

---